diff options
Diffstat (limited to 'target/linux/s3c24xx/patches-2.6.26/0000-reverse-openwrt-patches-921-922-923.patch')
| -rwxr-xr-x | target/linux/s3c24xx/patches-2.6.26/0000-reverse-openwrt-patches-921-922-923.patch | 1232 |
1 files changed, 1232 insertions, 0 deletions
diff --git a/target/linux/s3c24xx/patches-2.6.26/0000-reverse-openwrt-patches-921-922-923.patch b/target/linux/s3c24xx/patches-2.6.26/0000-reverse-openwrt-patches-921-922-923.patch new file mode 100755 index 0000000000..46acbd9999 --- /dev/null +++ b/target/linux/s3c24xx/patches-2.6.26/0000-reverse-openwrt-patches-921-922-923.patch @@ -0,0 +1,1232 @@ +diff -ruN linux-2.6.26.orig/Documentation/gpiommc.txt linux-2.6.26/Documentation/gpiommc.txt +--- linux-2.6.26.orig/Documentation/gpiommc.txt 2008-10-24 21:04:46.000000000 +0200 ++++ linux-2.6.26/Documentation/gpiommc.txt 1970-01-01 01:00:00.000000000 +0100 +@@ -1,97 +0,0 @@ +-GPIOMMC - Driver for an MMC/SD card on a bitbanging GPIO SPI bus +-================================================================ +- +-The gpiommc module hooks up the mmc_spi and spi_gpio modules for running an +-MMC or SD card on GPIO pins. +- +-Two interfaces for registering a new MMC/SD card device are provided: +-A static platform-device based mechanism and a dynamic configfs based interface. +- +- +-Registering devices via platform-device +-======================================= +- +-The platform-device interface is used for registering MMC/SD devices that are +-part of the hardware platform. This is most useful only for embedded machines +-with MMC/SD devices statically connected to the platform GPIO bus. +- +-The data structures are declared in <linux/mmc/gpiommc.h>. +- +-To register a new device, define an instance of struct gpiommc_platform_data. +-This structure holds any information about how the device is hooked up to the +-GPIO pins and what hardware modes the device supports. See the docbook-style +-documentation in the header file for more information on the struct fields. +- +-Then allocate a new instance of a platform device by doing: +- +- pdev = platform_device_alloc(GPIOMMC_PLATDEV_NAME, gpiommc_next_id()); +- +-This will allocate the platform device data structures and hook it up to the +-gpiommc driver. +-Then add the gpiommc_platform_data to the platform device. +- +- err = platform_device_add_data(pdev, pdata, sizeof(struct gpiommc_platform_data)); +- +-You may free the local instance of struct gpiommc_platform_data now. (So the +-struct may be allocated on the stack, too). +-Now simply register the platform device. +- +- err = platform_device_add(pdev); +- +-Done. The gpiommc probe routine will be invoked now and you should see a kernel +-log message for the added device. +- +- +-Registering devices via configfs +-================================ +- +-MMC/SD cards connected via GPIO often are a pretty dynamic thing, as for example +-selfmade hacks for soldering an MMC/SD card to standard GPIO pins on embedded +-hardware are a common situation. +-So we provide a dynamic interface to conveniently handle adding and removing +-devices from userspace, without the need to recompile the kernel. +- +-The "gpiommc" subdirectory at the configfs mountpoint is used for handling +-the dynamic configuration. +- +-To create a new device, it must first be allocated with mkdir. +-The following command will allocate a device named "my_mmc": +- mkdir /config/gpiommc/my_mmc +- +-There are several configuration files available in the new +-/config/gpiommc/my_mmc/ directory: +- +-gpio_data_in = The SPI data-IN GPIO pin number. +-gpio_data_out = The SPI data-OUT GPIO pin number. +-gpio_clock = The SPI Clock GPIO pin number. +-gpio_chipselect = The SPI Chipselect GPIO pin number. +-gpio_chipselect_activelow = Boolean. If 0, Chipselect is active-HIGH. +- If 1, Chipselect is active-LOW. +-spi_mode = The SPI data mode. Can be 0-3. +-spi_delay = Enable all delays in the lowlevel bitbanging. +-max_bus_speed = The maximum SPI bus speed. In Hertz. +- +-register = Not a configuration parameter. +- Used to register the configured card +- with the kernel. +- +-The device must first get configured and then registered by writing "1" to +-the "register" file. +-The configuration parameters "gpio_data_in", "gpio_data_out", "gpio_clock" +-and "gpio_chipselect" are essential and _must_ be configured before writing +-"1" to the "register" file. The registration will fail, otherwise. +- +-The default values for the other parameters are: +-gpio_chipselect_activelow = 1 (CS active-LOW) +-spi_mode = 0 (SPI_MODE_0) +-spi_delay = 1 (enabled) +-max_bus_speed = 5000000 (5 Mhz) +- +-Configuration values can not be changed after registration. To unregister +-the device, write a "0" to the "register" file. The configuration can be +-changed again after unregistering. +- +-To completely remove the device, simply rmdir the directory +-(/config/gpiommc/my_mmc in this example). +-There's no need to first unregister the device before removing it. That will +-be done automatically. +diff -ruN linux-2.6.26.orig/drivers/mmc/host/gpiommc.c linux-2.6.26/drivers/mmc/host/gpiommc.c +--- linux-2.6.26.orig/drivers/mmc/host/gpiommc.c 2008-10-24 21:04:46.000000000 +0200 ++++ linux-2.6.26/drivers/mmc/host/gpiommc.c 1970-01-01 01:00:00.000000000 +0100 +@@ -1,619 +0,0 @@ +-/* +- * Driver an MMC/SD card on a bitbanging GPIO SPI bus. +- * This module hooks up the mmc_spi and spi_gpio modules and also +- * provides a configfs interface. +- * +- * Copyright 2008 Michael Buesch <mb@bu3sch.de> +- * +- * Licensed under the GNU/GPL. See COPYING for details. +- */ +- +-#include <linux/mmc/gpiommc.h> +-#include <linux/platform_device.h> +-#include <linux/list.h> +-#include <linux/mutex.h> +-#include <linux/spi/spi_gpio.h> +-#include <linux/configfs.h> +-#include <linux/gpio.h> +-#include <asm/atomic.h> +- +- +-#define PFX "gpio-mmc: " +- +- +-struct gpiommc_device { +- struct platform_device *pdev; +- struct platform_device *spi_pdev; +- struct spi_board_info boardinfo; +-}; +- +- +-MODULE_DESCRIPTION("GPIO based MMC driver"); +-MODULE_AUTHOR("Michael Buesch"); +-MODULE_LICENSE("GPL"); +- +- +-static int gpiommc_boardinfo_setup(struct spi_board_info *bi, +- struct spi_master *master, +- void *data) +-{ +- struct gpiommc_device *d = data; +- struct gpiommc_platform_data *pdata = d->pdev->dev.platform_data; +- +- /* Bind the SPI master to the MMC-SPI host driver. */ +- strlcpy(bi->modalias, "mmc_spi", sizeof(bi->modalias)); +- +- bi->max_speed_hz = pdata->max_bus_speed; +- bi->bus_num = master->bus_num; +- bi->mode = pdata->mode; +- +- return 0; +-} +- +-static int gpiommc_probe(struct platform_device *pdev) +-{ +- struct gpiommc_platform_data *mmc_pdata = pdev->dev.platform_data; +- struct spi_gpio_platform_data spi_pdata; +- struct gpiommc_device *d; +- int err; +- +- err = -ENXIO; +- if (!mmc_pdata) +- goto error; +- +-#ifdef CONFIG_MMC_SPI_MODULE +- err = request_module("mmc_spi"); +- if (err) { +- printk(KERN_WARNING PFX +- "Failed to request mmc_spi module.\n"); +- } +-#endif /* CONFIG_MMC_SPI_MODULE */ +- +- /* Allocate the GPIO-MMC device */ +- err = -ENOMEM; +- d = kzalloc(sizeof(*d), GFP_KERNEL); +- if (!d) +- goto error; +- d->pdev = pdev; +- +- /* Create the SPI-GPIO device */ +- d->spi_pdev = platform_device_alloc(SPI_GPIO_PLATDEV_NAME, +- spi_gpio_next_id()); +- if (!d->spi_pdev) +- goto err_free_d; +- +- memset(&spi_pdata, 0, sizeof(spi_pdata)); +- spi_pdata.pin_clk = mmc_pdata->pins.gpio_clk; +- spi_pdata.pin_miso = mmc_pdata->pins.gpio_do; +- spi_pdata.pin_mosi = mmc_pdata->pins.gpio_di; +- spi_pdata.pin_cs = mmc_pdata->pins.gpio_cs; +- spi_pdata.cs_activelow = mmc_pdata->pins.cs_activelow; +- spi_pdata.no_spi_delay = mmc_pdata->no_spi_delay; +- spi_pdata.boardinfo_setup = gpiommc_boardinfo_setup; +- spi_pdata.boardinfo_setup_data = d; +- +- err = platform_device_add_data(d->spi_pdev, &spi_pdata, +- sizeof(spi_pdata)); +- if (err) +- goto err_free_pdev; +- err = platform_device_add(d->spi_pdev); +- if (err) +- goto err_free_pdata; +- platform_set_drvdata(pdev, d); +- +- printk(KERN_INFO PFX "MMC-Card \"%s\" " +- "attached to GPIO pins di=%u, do=%u, clk=%u, cs=%u\n", +- mmc_pdata->name, mmc_pdata->pins.gpio_di, +- mmc_pdata->pins.gpio_do, +- mmc_pdata->pins.gpio_clk, +- mmc_pdata->pins.gpio_cs); +- +- return 0; +- +-err_free_pdata: +- kfree(d->spi_pdev->dev.platform_data); +- d->spi_pdev->dev.platform_data = NULL; +-err_free_pdev: +- platform_device_put(d->spi_pdev); +-err_free_d: +- kfree(d); +-error: +- return err; +-} +- +-static int gpiommc_remove(struct platform_device *pdev) +-{ +- struct gpiommc_device *d = platform_get_drvdata(pdev); +- struct gpiommc_platform_data *pdata = d->pdev->dev.platform_data; +- +- platform_device_unregister(d->spi_pdev); +- printk(KERN_INFO PFX "GPIO based MMC-Card \"%s\" removed\n", +- pdata->name); +- platform_device_put(d->spi_pdev); +- +- return 0; +-} +- +-#ifdef CONFIG_GPIOMMC_CONFIGFS +- +-/* A device that was created through configfs */ +-struct gpiommc_configfs_device { +- struct config_item item; +- /* The platform device, after registration. */ +- struct platform_device *pdev; +- /* The configuration */ +- struct gpiommc_platform_data pdata; +- /* Mutex to protect this structure */ +- struct mutex mutex; +-}; +- +-#define GPIO_INVALID -1 +- +-static inline bool gpiommc_is_registered(struct gpiommc_configfs_device *dev) +-{ +- return (dev->pdev != NULL); +-} +- +-static inline struct gpiommc_configfs_device *ci_to_gpiommc(struct config_item *item) +-{ +- return item ? container_of(item, struct gpiommc_configfs_device, item) : NULL; +-} +- +-static struct configfs_attribute gpiommc_attr_DI = { +- .ca_owner = THIS_MODULE, +- .ca_name = "gpio_data_in", +- .ca_mode = S_IRUGO | S_IWUSR, +-}; +- +-static struct configfs_attribute gpiommc_attr_DO = { +- .ca_owner = THIS_MODULE, +- .ca_name = "gpio_data_out", +- .ca_mode = S_IRUGO | S_IWUSR, +-}; +- +-static struct configfs_attribute gpiommc_attr_CLK = { +- .ca_owner = THIS_MODULE, +- .ca_name = "gpio_clock", +- .ca_mode = S_IRUGO | S_IWUSR, +-}; +- +-static struct configfs_attribute gpiommc_attr_CS = { +- .ca_owner = THIS_MODULE, +- .ca_name = "gpio_chipselect", +- .ca_mode = S_IRUGO | S_IWUSR, +-}; +- +-static struct configfs_attribute gpiommc_attr_CS_activelow = { +- .ca_owner = THIS_MODULE, +- .ca_name = "gpio_chipselect_activelow", +- .ca_mode = S_IRUGO | S_IWUSR, +-}; +- +-static struct configfs_attribute gpiommc_attr_spimode = { +- .ca_owner = THIS_MODULE, +- .ca_name = "spi_mode", +- .ca_mode = S_IRUGO | S_IWUSR, +-}; +- +-static struct configfs_attribute gpiommc_attr_spidelay = { +- .ca_owner = THIS_MODULE, +- .ca_name = "spi_delay", +- .ca_mode = S_IRUGO | S_IWUSR, +-}; +- +-static struct configfs_attribute gpiommc_attr_max_bus_speed = { +- .ca_owner = THIS_MODULE, +- .ca_name = "max_bus_speed", +- .ca_mode = S_IRUGO | S_IWUSR, +-}; +- +-static struct configfs_attribute gpiommc_attr_register = { +- .ca_owner = THIS_MODULE, +- .ca_name = "register", +- .ca_mode = S_IRUGO | S_IWUSR, +-}; +- +-static struct configfs_attribute *gpiommc_config_attrs[] = { +- &gpiommc_attr_DI, +- &gpiommc_attr_DO, +- &gpiommc_attr_CLK, +- &gpiommc_attr_CS, +- &gpiommc_attr_CS_activelow, +- &gpiommc_attr_spimode, +- &gpiommc_attr_spidelay, +- &gpiommc_attr_max_bus_speed, +- &gpiommc_attr_register, +- NULL, +-}; +- +-static ssize_t gpiommc_config_attr_show(struct config_item *item, +- struct configfs_attribute *attr, +- char *page) +-{ +- struct gpiommc_configfs_device *dev = ci_to_gpiommc(item); +- ssize_t count = 0; +- unsigned int gpio; +- int err = 0; +- +- mutex_lock(&dev->mutex); +- +- if (attr == &gpiommc_attr_DI) { +- gpio = dev->pdata.pins.gpio_di; +- if (gpio == GPIO_INVALID) +- count = snprintf(page, PAGE_SIZE, "not configured\n"); +- else +- count = snprintf(page, PAGE_SIZE, "%u\n", gpio); +- goto out; +- } +- if (attr == &gpiommc_attr_DO) { +- gpio = dev->pdata.pins.gpio_do; +- if (gpio == GPIO_INVALID) +- count = snprintf(page, PAGE_SIZE, "not configured\n"); +- else +- count = snprintf(page, PAGE_SIZE, "%u\n", gpio); +- goto out; +- } +- if (attr == &gpiommc_attr_CLK) { +- gpio = dev->pdata.pins.gpio_clk; +- if (gpio == GPIO_INVALID) +- count = snprintf(page, PAGE_SIZE, "not configured\n"); +- else +- count = snprintf(page, PAGE_SIZE, "%u\n", gpio); +- goto out; +- } +- if (attr == &gpiommc_attr_CS) { +- gpio = dev->pdata.pins.gpio_cs; +- if (gpio == GPIO_INVALID) +- count = snprintf(page, PAGE_SIZE, "not configured\n"); +- else +- count = snprintf(page, PAGE_SIZE, "%u\n", gpio); +- goto out; +- } +- if (attr == &gpiommc_attr_CS_activelow) { +- count = snprintf(page, PAGE_SIZE, "%u\n", +- dev->pdata.pins.cs_activelow); +- goto out; +- } +- if (attr == &gpiommc_attr_spimode) { +- count = snprintf(page, PAGE_SIZE, "%u\n", +- dev->pdata.mode); +- goto out; +- } +- if (attr == &gpiommc_attr_spidelay) { +- count = snprintf(page, PAGE_SIZE, "%u\n", +- !dev->pdata.no_spi_delay); +- goto out; +- } +- if (attr == &gpiommc_attr_max_bus_speed) { +- count = snprintf(page, PAGE_SIZE, "%u\n", +- dev->pdata.max_bus_speed); +- goto out; +- } +- if (attr == &gpiommc_attr_register) { +- count = snprintf(page, PAGE_SIZE, "%u\n", +- gpiommc_is_registered(dev)); +- goto out; +- } +- WARN_ON(1); +- err = -ENOSYS; +-out: +- mutex_unlock(&dev->mutex); +- +- return err ? err : count; +-} +- +-static int gpiommc_do_register(struct gpiommc_configfs_device *dev, +- const char *name) +-{ +- int err; +- +- if (gpiommc_is_registered(dev)) +- return 0; +- +- if (!gpio_is_valid(dev->pdata.pins.gpio_di) || +- !gpio_is_valid(dev->pdata.pins.gpio_do) || +- !gpio_is_valid(dev->pdata.pins.gpio_clk) || +- !gpio_is_valid(dev->pdata.pins.gpio_cs)) { +- printk(KERN_ERR PFX +- "configfs: Invalid GPIO pin number(s)\n"); +- return -EINVAL; +- } +- +- strlcpy(dev->pdata.name, name, +- sizeof(dev->pdata.name)); +- +- dev->pdev = platform_device_alloc(GPIOMMC_PLATDEV_NAME, +- gpiommc_next_id()); +- if (!dev->pdev) +- return -ENOMEM; +- err = platform_device_add_data(dev->pdev, &dev->pdata, +- sizeof(dev->pdata)); +- if (err) { +- platform_device_put(dev->pdev); +- return err; +- } +- err = platform_device_add(dev->pdev); +- if (err) { +- platform_device_put(dev->pdev); +- return err; +- } +- +- return 0; +-} +- +-static void gpiommc_do_unregister(struct gpiommc_configfs_device *dev) +-{ +- if (!gpiommc_is_registered(dev)) +- return; +- +- platform_device_unregister(dev->pdev); +- dev->pdev = NULL; +-} +- +-static ssize_t gpiommc_config_attr_store(struct config_item *item, +- struct configfs_attribute *attr, +- const char *page, size_t count) +-{ +- struct gpiommc_configfs_device *dev = ci_to_gpiommc(item); +- int err = -EINVAL; +- unsigned long data; +- +- mutex_lock(&dev->mutex); +- +- if (attr == &gpiommc_attr_register) { +- err = strict_strtoul(page, 10, &data); +- if (err) +- goto out; +- err = -EINVAL; +- if (data == 1) +- err = gpiommc_do_register(dev, item->ci_name); +- if (data == 0) { +- gpiommc_do_unregister(dev); +- err = 0; +- } +- goto out; +- } +- +- if (gpiommc_is_registered(dev)) { +- /* The rest of the config parameters can only be set +- * as long as the device is not registered, yet. */ +- err = -EBUSY; +- goto out; +- } +- +- if (attr == &gpiommc_attr_DI) { +- err = strict_strtoul(page, 10, &data); +- if (err) +- goto out; +- err = -EINVAL; +- if (!gpio_is_valid(data)) +- goto out; +- dev->pdata.pins.gpio_di = data; +- err = 0; +- goto out; +- } +- if (attr == &gpiommc_attr_DO) { +- err = strict_strtoul(page, 10, &data); +- if (err) +- goto out; +- err = -EINVAL; +- if (!gpio_is_valid(data)) +- goto out; +- dev->pdata.pins.gpio_do = data; +- err = 0; +- goto out; +- } +- if (attr == &gpiommc_attr_CLK) { +- err = strict_strtoul(page, 10, &data); +- if (err) +- goto out; +- err = -EINVAL; +- if (!gpio_is_valid(data)) +- goto out; +- dev->pdata.pins.gpio_clk = data; +- err = 0; +- goto out; +- } +- if (attr == &gpiommc_attr_CS) { +- err = strict_strtoul(page, 10, &data); +- if (err) +- goto out; +- err = -EINVAL; +- if (!gpio_is_valid(data)) +- goto out; +- dev->pdata.pins.gpio_cs = data; +- err = 0; +- goto out; +- } +- if (attr == &gpiommc_attr_CS_activelow) { +- err = strict_strtoul(page, 10, &data); +- if (err) +- goto out; +- err = -EINVAL; +- if (data != 0 && data != 1) +- goto out; +- dev->pdata.pins.cs_activelow = data; +- err = 0; +- goto out; +- } +- if (attr == &gpiommc_attr_spimode) { +- err = strict_strtoul(page, 10, &data); +- if (err) +- goto out; +- err = -EINVAL; +- switch (data) { +- case 0: +- dev->pdata.mode = SPI_MODE_0; +- break; +- case 1: +- dev->pdata.mode = SPI_MODE_1; +- break; +- case 2: +- dev->pdata.mode = SPI_MODE_2; +- break; +- case 3: +- dev->pdata.mode = SPI_MODE_3; +- break; +- default: +- goto out; +- } +- err = 0; +- goto out; +- } +- if (attr == &gpiommc_attr_spidelay) { +- err = strict_strtoul(page, 10, &data); +- if (err) +- goto out; +- err = -EINVAL; +- if (data != 0 && data != 1) +- goto out; +- dev->pdata.no_spi_delay = !data; +- err = 0; +- goto out; +- } +- if (attr == &gpiommc_attr_max_bus_speed) { +- err = strict_strtoul(page, 10, &data); +- if (err) +- goto out; +- err = -EINVAL; +- if (data > UINT_MAX) +- goto out; +- dev->pdata.max_bus_speed = data; +- err = 0; +- goto out; +- } +- WARN_ON(1); +- err = -ENOSYS; +-out: +- mutex_unlock(&dev->mutex); +- +- return err ? err : count; +-} +- +-static void gpiommc_config_item_release(struct config_item *item) +-{ +- struct gpiommc_configfs_device *dev = ci_to_gpiommc(item); +- +- kfree(dev); +-} +- +-static struct configfs_item_operations gpiommc_config_item_ops = { +- .release = gpiommc_config_item_release, +- .show_attribute = gpiommc_config_attr_show, +- .store_attribute = gpiommc_config_attr_store, +-}; +- +-static struct config_item_type gpiommc_dev_ci_type = { +- .ct_item_ops = &gpiommc_config_item_ops, +- .ct_attrs = gpiommc_config_attrs, +- .ct_owner = THIS_MODULE, +-}; +- +-static struct config_item *gpiommc_make_item(struct config_group *group, +- const char *name) +-{ +- struct gpiommc_configfs_device *dev; +- +- if (strlen(name) > GPIOMMC_MAX_NAMELEN) { +- printk(KERN_ERR PFX "configfs: device name too long\n"); +- return NULL; +- } +- +- dev = kzalloc(sizeof(*dev), GFP_KERNEL); +- if (!dev) +- return NULL; +- +- mutex_init(&dev->mutex); +- config_item_init_type_name(&dev->item, name, +- &gpiommc_dev_ci_type); +- +- /* Assign default configuration */ +- dev->pdata.pins.gpio_di = GPIO_INVALID; +- dev->pdata.pins.gpio_do = GPIO_INVALID; +- dev->pdata.pins.gpio_clk = GPIO_INVALID; +- dev->pdata.pins.gpio_cs = GPIO_INVALID; +- dev->pdata.pins.cs_activelow = 1; +- dev->pdata.mode = SPI_MODE_0; +- dev->pdata.no_spi_delay = 0; +- dev->pdata.max_bus_speed = 5000000; /* 5 MHz */ +- +- return &(dev->item); +-} +- +-static void gpiommc_drop_item(struct config_group *group, +- struct config_item *item) +-{ +- struct gpiommc_configfs_device *dev = ci_to_gpiommc(item); +- +- gpiommc_do_unregister(dev); +- kfree(dev); +-} +- +-static struct configfs_group_operations gpiommc_ct_group_ops = { +- .make_item = gpiommc_make_item, +- .drop_item = gpiommc_drop_item, +-}; +- +-static struct config_item_type gpiommc_ci_type = { +- .ct_group_ops = &gpiommc_ct_group_ops, +- .ct_owner = THIS_MODULE, +-}; +- +-static struct configfs_subsystem gpiommc_subsys = { +- .su_group = { +- .cg_item = { +- .ci_namebuf = GPIOMMC_PLATDEV_NAME, +- .ci_type = &gpiommc_ci_type, +- }, +- }, +- .su_mutex = __MUTEX_INITIALIZER(gpiommc_subsys.su_mutex), +-}; +- +-#endif /* CONFIG_GPIOMMC_CONFIGFS */ +- +-static struct platform_driver gpiommc_plat_driver = { +- .probe = gpiommc_probe, +- .remove = gpiommc_remove, +- .driver = { +- .name = GPIOMMC_PLATDEV_NAME, +- .owner = THIS_MODULE, +- }, +-}; +- +-int gpiommc_next_id(void) +-{ +- static atomic_t counter = ATOMIC_INIT(-1); +- +- return atomic_inc_return(&counter); +-} +-EXPORT_SYMBOL(gpiommc_next_id); +- +-static int __init gpiommc_modinit(void) +-{ +- int err; +- +- err = platform_driver_register(&gpiommc_plat_driver); +- if (err) +- return err; +- +-#ifdef CONFIG_GPIOMMC_CONFIGFS +- config_group_init(&gpiommc_subsys.su_group); +- err = configfs_register_subsystem(&gpiommc_subsys); +- if (err) { +- platform_driver_unregister(&gpiommc_plat_driver); +- return err; +- } +-#endif /* CONFIG_GPIOMMC_CONFIGFS */ +- +- return 0; +-} +-module_init(gpiommc_modinit); +- +-static void __exit gpiommc_modexit(void) +-{ +-#ifdef CONFIG_GPIOMMC_CONFIGFS +- configfs_unregister_subsystem(&gpiommc_subsys); +-#endif +- platform_driver_unregister(&gpiommc_plat_driver); +-} +-module_exit(gpiommc_modexit); +diff -ruN linux-2.6.26.orig/drivers/mmc/host/Kconfig linux-2.6.26/drivers/mmc/host/Kconfig +--- linux-2.6.26.orig/drivers/mmc/host/Kconfig 2008-10-24 21:04:46.000000000 +0200 ++++ linux-2.6.26/drivers/mmc/host/Kconfig 2008-10-24 21:03:47.000000000 +0200 +@@ -130,27 +130,3 @@ + + If unsure, or if your system has no SPI master driver, say N. + +-config GPIOMMC +- tristate "MMC/SD over GPIO-based SPI" +- depends on MMC && MMC_SPI && SPI_GPIO +- help +- This driver hooks up the mmc_spi and spi_gpio modules so that +- MMC/SD cards can be used on a GPIO based bus by bitbanging +- the SPI protocol in software. +- +- This driver provides a configfs interface to dynamically create +- and destroy GPIO-based MMC/SD card devices. It also provides +- a platform device interface API. +- See Documentation/gpiommc.txt for details. +- +- The module will be called gpiommc. +- +- If unsure, say N. +- +-config GPIOMMC_CONFIGFS +- bool +- depends on GPIOMMC && CONFIGFS_FS +- default y +- help +- This option automatically enables configfs support for gpiommc +- if configfs is available. +diff -ruN linux-2.6.26.orig/drivers/mmc/host/Makefile linux-2.6.26/drivers/mmc/host/Makefile +--- linux-2.6.26.orig/drivers/mmc/host/Makefile 2008-10-24 21:04:46.000000000 +0200 ++++ linux-2.6.26/drivers/mmc/host/Makefile 2008-10-24 21:03:47.000000000 +0200 +@@ -17,4 +17,4 @@ + obj-$(CONFIG_MMC_AT91) += at91_mci.o + obj-$(CONFIG_MMC_TIFM_SD) += tifm_sd.o + obj-$(CONFIG_MMC_SPI) += mmc_spi.o +-obj-$(CONFIG_GPIOMMC) += gpiommc.o ++ +diff -ruN linux-2.6.26.orig/drivers/spi/Kconfig linux-2.6.26/drivers/spi/Kconfig +--- linux-2.6.26.orig/drivers/spi/Kconfig 2008-10-24 21:04:46.000000000 +0200 ++++ linux-2.6.26/drivers/spi/Kconfig 2008-10-24 21:03:47.000000000 +0200 +@@ -100,19 +100,6 @@ + inexpensive battery powered microcontroller evaluation board. + This same cable can be used to flash new firmware. + +-config SPI_GPIO +- tristate "GPIO API based bitbanging SPI controller" +- depends on SPI_MASTER && GENERIC_GPIO +- select SPI_BITBANG +- help +- This is a platform driver that can be used for bitbanging +- an SPI bus over GPIO pins. +- Select this if you have any SPI device that is connected via +- GPIO pins. +- The module will be called spi_gpio. +- +- If unsure, say N. +- + config SPI_IMX + tristate "Freescale iMX SPI controller" + depends on SPI_MASTER && ARCH_IMX && EXPERIMENTAL +diff -ruN linux-2.6.26.orig/drivers/spi/Makefile linux-2.6.26/drivers/spi/Makefile +--- linux-2.6.26.orig/drivers/spi/Makefile 2008-10-24 21:04:46.000000000 +0200 ++++ linux-2.6.26/drivers/spi/Makefile 2008-10-24 21:03:47.000000000 +0200 +@@ -16,7 +16,6 @@ + obj-$(CONFIG_SPI_BITBANG) += spi_bitbang.o + obj-$(CONFIG_SPI_AU1550) += au1550_spi.o + obj-$(CONFIG_SPI_BUTTERFLY) += spi_butterfly.o +-obj-$(CONFIG_SPI_GPIO) += spi_gpio.o + obj-$(CONFIG_SPI_IMX) += spi_imx.o + obj-$(CONFIG_SPI_LM70_LLP) += spi_lm70llp.o + obj-$(CONFIG_SPI_PXA2XX) += pxa2xx_spi.o +diff -ruN linux-2.6.26.orig/drivers/spi/spi_gpio.c linux-2.6.26/drivers/spi/spi_gpio.c +--- linux-2.6.26.orig/drivers/spi/spi_gpio.c 2008-10-24 21:04:46.000000000 +0200 ++++ linux-2.6.26/drivers/spi/spi_gpio.c 1970-01-01 01:00:00.000000000 +0100 +@@ -1,251 +0,0 @@ +-/* +- * Bitbanging SPI bus driver using GPIO API +- * +- * Copyright (c) 2008 Piotr Skamruk +- * Copyright (c) 2008 Michael Buesch +- * +- * based on spi_s3c2410_gpio.c +- * Copyright (c) 2006 Ben Dooks +- * Copyright (c) 2006 Simtec Electronics +- * and on i2c-gpio.c +- * Copyright (C) 2007 Atmel Corporation +- * +- * This program is free software; you can redistribute it and/or modify +- * it under the terms of the GNU General Public License version 2 as +- * published by the Free Software Foundation. +- */ +- +-#include <linux/kernel.h> +-#include <linux/init.h> +-#include <linux/delay.h> +-#include <linux/spinlock.h> +-#include <linux/workqueue.h> +-#include <linux/module.h> +-#include <linux/platform_device.h> +-#include <linux/spi/spi.h> +-#include <linux/spi/spi_bitbang.h> +-#include <linux/spi/spi_gpio.h> +-#include <linux/gpio.h> +-#include <asm/atomic.h> +- +- +-struct spi_gpio { +- struct spi_bitbang bitbang; +- struct spi_gpio_platform_data *info; +- struct platform_device *pdev; +- struct spi_board_info bi; +-}; +- +- +-static inline struct spi_gpio *spidev_to_sg(struct spi_device *dev) +-{ +- return dev->controller_data; +-} +- +-static inline void setsck(struct spi_device *dev, int val) +-{ +- struct spi_gpio *sp = spidev_to_sg(dev); +- gpio_set_value(sp->info->pin_clk, val ? 1 : 0); +-} +- +-static inline void setmosi(struct spi_device *dev, int val) +-{ +- struct spi_gpio *sp = spidev_to_sg(dev); +- gpio_set_value(sp->info->pin_mosi, val ? 1 : 0); +-} +- +-static inline u32 getmiso(struct spi_device *dev) +-{ +- struct spi_gpio *sp = spidev_to_sg(dev); +- return gpio_get_value(sp->info->pin_miso) ? 1 : 0; +-} +- +-static inline void do_spidelay(struct spi_device *dev, unsigned nsecs) +-{ +- struct spi_gpio *sp = spidev_to_sg(dev); +- +- if (!sp->info->no_spi_delay) +- ndelay(nsecs); +-} +- +-#define spidelay(nsecs) do { \ +- /* Steal the spi_device pointer from our caller. \ +- * The bitbang-API should probably get fixed here... */ \ +- do_spidelay(spi, nsecs); \ +- } while (0) +- +-#define EXPAND_BITBANG_TXRX +-#include <linux/spi/spi_bitbang.h> +- +-static u32 spi_gpio_txrx_mode0(struct spi_device *spi, +- unsigned nsecs, u32 word, u8 bits) +-{ +- return bitbang_txrx_be_cpha0(spi, nsecs, 0, word, bits); +-} +- +-static u32 spi_gpio_txrx_mode1(struct spi_device *spi, +- unsigned nsecs, u32 word, u8 bits) +-{ +- return bitbang_txrx_be_cpha1(spi, nsecs, 0, word, bits); +-} +- +-static u32 spi_gpio_txrx_mode2(struct spi_device *spi, +- unsigned nsecs, u32 word, u8 bits) +-{ +- return bitbang_txrx_be_cpha0(spi, nsecs, 1, word, bits); +-} +- +-static u32 spi_gpio_txrx_mode3(struct spi_device *spi, +- unsigned nsecs, u32 word, u8 bits) +-{ +- return bitbang_txrx_be_cpha1(spi, nsecs, 1, word, bits); +-} +- +-static void spi_gpio_chipselect(struct spi_device *dev, int on) +-{ +- struct spi_gpio *sp = spidev_to_sg(dev); +- +- if (sp->info->cs_activelow) +- on = !on; +- gpio_set_value(sp->info->pin_cs, on ? 1 : 0); +-} +- +-static int spi_gpio_probe(struct platform_device *pdev) +-{ +- struct spi_master *master; +- struct spi_gpio_platform_data *pdata; +- struct spi_gpio *sp; +- struct spi_device *spidev; +- int err; +- +- pdata = pdev->dev.platform_data; +- if (!pdata) +- return -ENXIO; +- +- err = -ENOMEM; +- master = spi_alloc_master(&pdev->dev, sizeof(struct spi_gpio)); +- if (!master) +- goto err_alloc_master; +- +- sp = spi_master_get_devdata(master); +- platform_set_drvdata(pdev, sp); +- sp->info = pdata; +- +- err = gpio_request(pdata->pin_clk, "spi_clock"); +- if (err) +- goto err_request_clk; +- err = gpio_request(pdata->pin_mosi, "spi_mosi"); +- if (err) +- goto err_request_mosi; +- err = gpio_request(pdata->pin_miso, "spi_miso"); +- if (err) +- goto err_request_miso; +- err = gpio_request(pdata->pin_cs, "spi_cs"); +- if (err) +- goto err_request_cs; +- +- sp->bitbang.master = spi_master_get(master); +- sp->bitbang.master->bus_num = -1; +- sp->bitbang.master->num_chipselect = 1; +- sp->bitbang.chipselect = spi_gpio_chipselect; +- sp->bitbang.txrx_word[SPI_MODE_0] = spi_gpio_txrx_mode0; +- sp->bitbang.txrx_word[SPI_MODE_1] = spi_gpio_txrx_mode1; +- sp->bitbang.txrx_word[SPI_MODE_2] = spi_gpio_txrx_mode2; +- sp->bitbang.txrx_word[SPI_MODE_3] = spi_gpio_txrx_mode3; +- +- gpio_direction_output(pdata->pin_clk, 0); +- gpio_direction_output(pdata->pin_mosi, 0); +- gpio_direction_output(pdata->pin_cs, +- pdata->cs_activelow ? 1 : 0); +- gpio_direction_input(pdata->pin_miso); +- +- err = spi_bitbang_start(&sp->bitbang); +- if (err) +- goto err_no_bitbang; +- err = pdata->boardinfo_setup(&sp->bi, master, +- pdata->boardinfo_setup_data); +- if (err) +- goto err_bi_setup; +- sp->bi.controller_data = sp; +- spidev = spi_new_device(master, &sp->bi); +- if (!spidev) +- goto err_new_dev; +- +- return 0; +- +-err_new_dev: +-err_bi_setup: +- spi_bitbang_stop(&sp->bitbang); +-err_no_bitbang: +- spi_master_put(sp->bitbang.master); +- gpio_free(pdata->pin_cs); +-err_request_cs: +- gpio_free(pdata->pin_miso); +-err_request_miso: +- gpio_free(pdata->pin_mosi); +-err_request_mosi: +- gpio_free(pdata->pin_clk); +-err_request_clk: +- kfree(master); +- +-err_alloc_master: +- return err; +-} +- +-static int __devexit spi_gpio_remove(struct platform_device *pdev) +-{ +- struct spi_gpio *sp; +- struct spi_gpio_platform_data *pdata; +- +- pdata = pdev->dev.platform_data; +- sp = platform_get_drvdata(pdev); +- +- gpio_free(pdata->pin_clk); +- gpio_free(pdata->pin_mosi); +- gpio_free(pdata->pin_miso); +- gpio_free(pdata->pin_cs); +- spi_bitbang_stop(&sp->bitbang); +- spi_master_put(sp->bitbang.master); +- +- return 0; +-} +- +-static struct platform_driver spi_gpio_driver = { +- .driver = { +- .name = SPI_GPIO_PLATDEV_NAME, +- .owner = THIS_MODULE, +- }, +- .probe = spi_gpio_probe, +- .remove = __devexit_p(spi_gpio_remove), +-}; +- +-int spi_gpio_next_id(void) +-{ +- static atomic_t counter = ATOMIC_INIT(-1); +- +- return atomic_inc_return(&counter); +-} +-EXPORT_SYMBOL(spi_gpio_next_id); +- +-static int __init spi_gpio_init(void) +-{ +- int err; +- +- err = platform_driver_register(&spi_gpio_driver); +- if (err) +- printk(KERN_ERR "spi-gpio: register failed: %d\n", err); +- +- return err; +-} +-module_init(spi_gpio_init); +- +-static void __exit spi_gpio_exit(void) +-{ +- platform_driver_unregister(&spi_gpio_driver); +-} +-module_exit(spi_gpio_exit); +- +-MODULE_AUTHOR("Piot Skamruk <piotr.skamruk at gmail.com>"); +-MODULE_AUTHOR("Michael Buesch"); +-MODULE_DESCRIPTION("Platform independent GPIO bitbanging SPI driver"); +-MODULE_LICENSE("GPL v2"); +diff -ruN linux-2.6.26.orig/include/linux/mmc/gpiommc.h linux-2.6.26/include/linux/mmc/gpiommc.h +--- linux-2.6.26.orig/include/linux/mmc/gpiommc.h 2008-10-24 21:04:46.000000000 +0200 ++++ linux-2.6.26/include/linux/mmc/gpiommc.h 1970-01-01 01:00:00.000000000 +0100 +@@ -1,71 +0,0 @@ +-/* +- * Device driver for MMC/SD cards driven over a GPIO bus. +- * +- * Copyright (c) 2008 Michael Buesch +- * +- * Licensed under the GNU/GPL version 2. +- */ +-#ifndef LINUX_GPIOMMC_H_ +-#define LINUX_GPIOMMC_H_ +- +-#include <linux/types.h> +- +- +-#define GPIOMMC_MAX_NAMELEN 15 +-#define GPIOMMC_MAX_NAMELEN_STR __stringify(GPIOMMC_MAX_NAMELEN) +- +-/** +- * struct gpiommc_pins - Hardware pin assignments +- * +- * @gpio_di: The GPIO number of the DATA IN pin +- * @gpio_do: The GPIO number of the DATA OUT pin +- * @gpio_clk: The GPIO number of the CLOCK pin +- * @gpio_cs: The GPIO number of the CHIPSELECT pin +- * @cs_activelow: If true, the chip is considered selected if @gpio_cs is low. +- */ +-struct gpiommc_pins { +- unsigned int gpio_di; +- unsigned int gpio_do; +- unsigned int gpio_clk; +- unsigned int gpio_cs; +- bool cs_activelow; +-}; +- +-/** +- * struct gpiommc_platform_data - Platform data for a MMC-over-SPI-GPIO device. +- * +- * @name: The unique name string of the device. +- * @pins: The hardware pin assignments. +- * @mode: The hardware mode. This is either SPI_MODE_0, +- * SPI_MODE_1, SPI_MODE_2 or SPI_MODE_3. See the SPI documentation. +- * @no_spi_delay: Do not use delays in the lowlevel SPI bitbanging code. +- * This is not standards compliant, but may be required for some +- * embedded machines to gain reasonable speed. +- * @max_bus_speed: The maximum speed of the SPI bus, in Hertz. +- */ +-struct gpiommc_platform_data { +- char name[GPIOMMC_MAX_NAMELEN + 1]; +- struct gpiommc_pins pins; +- u8 mode; +- bool no_spi_delay; +- unsigned int max_bus_speed; +-}; +- +-/** +- * GPIOMMC_PLATDEV_NAME - The platform device name string. +- * +- * The name string that has to be used for platform_device_alloc +- * when allocating a gpiommc device. +- */ +-#define GPIOMMC_PLATDEV_NAME "gpiommc" +- +-/** +- * gpiommc_next_id - Get another platform device ID number. +- * +- * This returns the next platform device ID number that has to be used +- * for platform_device_alloc. The ID is opaque and should not be used for +- * anything else. +- */ +-int gpiommc_next_id(void); +- +-#endif /* LINUX_GPIOMMC_H_ */ +diff -ruN linux-2.6.26.orig/include/linux/spi/spi_gpio.h linux-2.6.26/include/linux/spi/spi_gpio.h +--- linux-2.6.26.orig/include/linux/spi/spi_gpio.h 2008-10-24 21:04:46.000000000 +0200 ++++ linux-2.6.26/include/linux/spi/spi_gpio.h 1970-01-01 01:00:00.000000000 +0100 +@@ -1,73 +0,0 @@ +-/* +- * spi_gpio interface to platform code +- * +- * Copyright (c) 2008 Piotr Skamruk +- * Copyright (c) 2008 Michael Buesch +- * +- * This program is free software; you can redistribute it and/or modify +- * it under the terms of the GNU General Public License version 2 as +- * published by the Free Software Foundation. +- */ +-#ifndef _LINUX_SPI_SPI_GPIO +-#define _LINUX_SPI_SPI_GPIO +- +-#include <linux/types.h> +-#include <linux/spi/spi.h> +- +- +-/** +- * struct spi_gpio_platform_data - Data definitions for a SPI-GPIO device. +- * +- * This structure holds information about a GPIO-based SPI device. +- * +- * @pin_clk: The GPIO pin number of the CLOCK pin. +- * +- * @pin_miso: The GPIO pin number of the MISO pin. +- * +- * @pin_mosi: The GPIO pin number of the MOSI pin. +- * +- * @pin_cs: The GPIO pin number of the CHIPSELECT pin. +- * +- * @cs_activelow: If true, the chip is selected when the CS line is low. +- * +- * @no_spi_delay: If true, no delay is done in the lowlevel bitbanging. +- * Note that doing no delay is not standards compliant, +- * but it might be needed to speed up transfers on some +- * slow embedded machines. +- * +- * @boardinfo_setup: This callback is called after the +- * SPI master device was registered, but before the +- * device is registered. +- * @boardinfo_setup_data: Data argument passed to boardinfo_setup(). +- */ +-struct spi_gpio_platform_data { +- unsigned int pin_clk; +- unsigned int pin_miso; +- unsigned int pin_mosi; +- unsigned int pin_cs; +- bool cs_activelow; +- bool no_spi_delay; +- int (*boardinfo_setup)(struct spi_board_info *bi, +- struct spi_master *master, +- void *data); +- void *boardinfo_setup_data; +-}; +- +-/** +- * SPI_GPIO_PLATDEV_NAME - The platform device name string. +- * +- * The name string that has to be used for platform_device_alloc +- * when allocating a spi-gpio device. +- */ +-#define SPI_GPIO_PLATDEV_NAME "spi-gpio" +- +-/** +- * spi_gpio_next_id - Get another platform device ID number. +- * +- * This returns the next platform device ID number that has to be used +- * for platform_device_alloc. The ID is opaque and should not be used for +- * anything else. +- */ +-int spi_gpio_next_id(void); +- +-#endif /* _LINUX_SPI_SPI_GPIO */ +diff -ruN linux-2.6.26.orig/MAINTAINERS linux-2.6.26/MAINTAINERS +--- linux-2.6.26.orig/MAINTAINERS 2008-10-24 21:04:46.000000000 +0200 ++++ linux-2.6.26/MAINTAINERS 2008-10-24 21:04:02.000000000 +0200 +@@ -1818,11 +1818,6 @@ + W: http://gigaset307x.sourceforge.net/ + S: Maintained + +-GPIOMMC DRIVER +-P: Michael Buesch +-M: mb@bu3sch.de +-S: Maintained +- + HARDWARE MONITORING + P: Mark M. Hoffman + M: mhoffman@lightlink.com +@@ -3800,11 +3795,6 @@ + W: http://www.ibm.com/developerworks/power/cell/ + S: Supported + +-SPI GPIO MASTER DRIVER +-P: Michael Buesch +-M: mb@bu3sch.de +-S: Maintained +- + STABLE BRANCH: + P: Greg Kroah-Hartman + M: greg@kroah.com |